You are here: NRS Home / Publications & Data / Invasion speed is affected by geographical variation in the strength of Allee effects

Publication Details

Publication Toolbox
  • Download PDF  (961 KB)
  • This publication is available only online.

Invasion speed is affected by geographical variation in the strength of Allee effects

Year Published

2007

Source

Ecology Letters. 10: 36-43.

Abstract

Allee effects can play a critical role in slowing or preventing the establishment of low density founder populations of non-indigenous species. Similarly, the spread of established invaders into new habitats can be influenced by the degree to which small founder populations ahead of the invasion front are suppressed through Allee effects. We develop an approach to use empirical data on the gypsy moth, a non-indigenous invader in North America, to quantify the Allee threshold across geographical regions, and we report that the strength of the Allee effect is subject to spatial and temporal variability. Moreover, we present what is to our knowledge the first empirical evidence that geographical regions with higher Allee thresholds are associated with slower speeds of invasion.

Keywords

Citation

Tobin, Patrick C.; Whitmire, Stephanie L.; Johnson, Derek M.; Bjornstad, Ottar N.; Liebhold, Andrew M. 2007. Invasion speed is affected by geographical variation in the strength of Allee effects. Ecology Letters. 10: 36-43.
Last updated on: January 19, 2007

NRS at a Glance